package org.phoenixframework.api.course.config.spring;

import org.phoenixframework.common.entity.annotation.ApiVersion;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.web.servlet.mvc.condition.RequestCondition;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

import java.lang.reflect.Method;

/**
 * Created by IntelliJ IDEA.
 *
 * @author doublelifeke
 * Email: hautxxxyzjk@163.com
 * DateTime: 2021/7/29 13:26
 * Description: 第三步：重写RequestMappingHandlerMapping，自定义匹配的处理器
 */
public class ApiRequestMappingHandlerMapping extends RequestMappingHandlerMapping {

    @Override
    protected RequestCondition<?> getCustomTypeCondition(Class<?> handlerType) {
        // 扫描类上的 @ApiVersion
        ApiVersion apiVersion = AnnotationUtils.findAnnotation(handlerType, ApiVersion.class);
        return createRequestCondition(apiVersion);
    }
    @Override
    protected RequestCondition<?> getCustomMethodCondition(Method method) {
        // 扫描方法上的 @ApiVersion
        ApiVersion apiVersion = AnnotationUtils.findAnnotation(method, ApiVersion.class);
        return createRequestCondition(apiVersion);
    }
    private RequestCondition<ApiVersionCondition> createRequestCondition(ApiVersion apiVersion) {
        return apiVersion == null ? null : new ApiVersionCondition(apiVersion.value());
    }

}
